Mapping Third Open Enrollment Period Plan Selections by County

By Anna Gilbert

Nearly 8.7 million consumers in states that use the enrollment platform chose a marketplace plan during the first ten weeks of the third open enrollment period (OE3). The Office of the Assistant Secretary for Planning and Evaluation (ASPE) at the Department of Health and Human Services recently released ZIP code–level counts of total plan selections from November 1 to January 9.

Last week, we took a look at how many states had surpassed their OE2 enrollment totals as of December 26, 2015 (the latest date for which data are available for all 50 states). Now, these ZIP code–level counts give us the opportunity to look at how enrollment is going so far at a more granular level. The available data tell a clear success story of OE3’s momentum. More than half of the counties with available data (56 percent) have already reached at least 90 percent of the total plan selections they saw during OE2. These counties are represented below in dark blue.







To learn more about individual counties, we’ve also put together an interactive county-level map comparing OE3 plan selections so far with total OE2 plan selections. Or if you’d like to dig into the data yourself, you can download county and ZIP code–level data files.


To create the county level estimates, we used the HUD USPS ZIP Code Crosswalk Files for Counties and ZIP Codes and multiplied the residential ratio for ZIP codes and their corresponding counties with the ZIP code level plan selections, then aggregated by county. The HUD data set is also publicly available.

Note: The data set from ASPE does not include data on ZIP codes with fewer than 50 plan selections, so a small number of counties in states also do not have data at this time.

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